Headphone



FIG. 1 is a perspective view of the front, bottom and right side of a headphone showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the headphone is included for the purpose of illustrating portions of the headphone and forms no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 